Unable to start nginx after install in AWS EC2

Hi
I am very new to Kaltura. Installed Kaltura CE 13.14.0 in AWS Instance. Not been able to start nginx

– Unit kaltura-nginx.service has begun starting up.
Mar 12 17:49:13 nginx[28484]: nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
Mar 12 17:49:13 nginx[28484]: nginx: [alert] mmap(MAP_ANON|MAP_SHARED, 536870912) failed (12: Cannot allocate memory)
Mar 12 17:49:13 nginx[28484]: nginx: configuration file /etc/nginx/nginx.conf test failed
Mar 12 17:49:13 systemd[1]: kaltura-nginx.service: control process exited, code=exited status=1
Mar 12 17:49:13 ip-172-31-31-28.us-west-2.compute.internal systemd[1]: Failed to start nginx - high performance web server.
– Subject: Unit kaltura-nginx.service has failed
– Defined-By: systemd
– Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel